/**
Start the MTFTP session for upload.
It will first init some states, then send the WRQ request packet,
and start receiving the packet.
@param Instance The MTFTP session
@param Operation Redundant parameter, which is always
EFI_MTFTP4_OPCODE_WRQ here.
@retval EFI_SUCCESS The upload process has been started.
@retval Others Failed to start the upload.
**/
EFI_STATUS
Mtftp4WrqStart (
IN MTFTP4_PROTOCOL *Instance,
IN UINT16 Operation
)
{
EFI_STATUS Status;
//
// The valid block number range are [0, 0xffff]. For example:
// the client sends an WRQ request to the server, the server
// ACK with an ACK0 to let client start transfer the first
// packet.
//
Status = Mtftp4InitBlockRange (&Instance->Blocks, 0, 0xffff);
if (EFI_ERROR (Status)) {
return Status;
}
Status = Mtftp4SendRequest (Instance);
if (EFI_ERROR (Status)) {
return Status;
}
return UdpIoRecvDatagram (Instance->UnicastPort, Mtftp4WrqInput, Instance, 0);
}
/**
Start the MTFTP session to download.
It will first initialize some of the internal states then build and send a RRQ
reqeuest packet, at last, it will start receive for the downloading.
@param Instance The Mtftp session
@param Operation The MTFTP opcode, it may be a EFI_MTFTP4_OPCODE_RRQ
or EFI_MTFTP4_OPCODE_DIR.
@retval EFI_SUCCESS The mtftp download session is started.
@retval Others Failed to start downloading.
**/
EFI_STATUS
Mtftp4RrqStart (
IN MTFTP4_PROTOCOL *Instance,
IN UINT16 Operation
)
{
EFI_STATUS Status;
//
// The valid block number range are [1, 0xffff]. For example:
// the client sends an RRQ request to the server, the server
// transfers the DATA1 block. If option negoitation is ongoing,
// the server will send back an OACK, then client will send ACK0.
//
Status = Mtftp4InitBlockRange (&Instance->Blocks, 1, 0xffff);
if (EFI_ERROR (Status)) {
return Status;
}
Status = Mtftp4SendRequest (Instance);
if (EFI_ERROR (Status)) {
return Status;
}
return UdpIoRecvDatagram (Instance->UnicastPort, Mtftp4RrqInput, Instance, 0);
}